The most successful parasites are the ones that live in harmony with their hosts
Indicate whether this statement is true or false.
TRUE
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Which action is unable to produce variation?
A. Crossing over B. Random alignment of chromosomes during meiosis C. Asexual reproduction D. Genetic recombination of alleles E. Sexual reproduction
Mucous membranes are quite thin and fragile. How can such delicate tissue provide defense against microbial invaders?
A) the mucus secreted by the mucous membrane physically traps microbes. B) the mucus contains a variety of antimicrobial chemicals and molecules. C) both the mucus and the outer layer of cells are shed frequently. D) the mucus is a physical trap that contains a variety of antimicrobial chemicals. E) the mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.
A human cell placed in a hypotonic environment would...
What will be an ideal response?
Exercise does not play a key role in weight loss.
a. true b. false